package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.google.gson.JsonObject;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {
    private static final String url = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    private String getOpenId(String code){
        Map<String,String> paramMap = new HashMap<>();
        paramMap.put("appid",weChatProperties.getAppid());
        paramMap.put("secret",weChatProperties.getSecret());
        paramMap.put("js_code",code);
        paramMap.put("grant_type","authorization_code");
        //发送请求
        String s = HttpClientUtil.doGet(url, paramMap);

        JSONObject jsonObject = JSON.parseObject(s);
        String openid = (String) jsonObject.get("openid");

        return openid;

    }

//C端用户登录
    @Override
    public User userLogin(String code) {
        String openId = getOpenId(code);

        if (openId == null){
            throw new LoginFailedException("登录失败");
        }
        //判断是否是新用户
        User user = userMapper.selectByOpenId(openId);
        if (user == null){
            user = User.builder()
                        .openid(openId)
                        .createTime(LocalDateTime.now())
                        .build();
            userMapper.insert(user);
        }

        return user;
    }
}
